<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
<script>
    function Star(uname, age) {
        this.uname = uname;
        this.age = age;
    }

    Star.prototype.sing = function () {
        console.log('我会唱歌');

    }
    Star.prototype.sex = '女';
    // Object.prototype.sex = '男';
    var ldh = new Star('刘德华', 18);
    ldh.sex = '男';
    console.log(ldh.sex);
    console.log(Object.prototype);
    console.log(ldh);
    console.log(Star.prototype);
    console.log(ldh.toString());
</script>
</body>

</html>
